Anchor



M. W. HALL ANCHOR Filed Feb. 2. 1924 July 19, 1927.

INVENTOR fp/Kme ATTORNEY Patented July 19 192.7.

umm-w. nur., or Naw accuenta, Naw von.

manon.

Appnuamn mea February 2, 1924. semina. 390,111.

This invention relates to anchors for ships use, and my improvements aredirected to ,that type of anchorl having pivotal fiukes. Usually, withthis type of anchor the flukes are crowned with an abutment structureCul which 'engages the surface the flukes are\in 4tended to penetrate,and thereby limits the degree to which the iiukes can dig into the sand,mud or other bottom.

It is an object of my invention to entirely avoid this objection. 'j Thelukes of my improved anchor -are designed to present a broad, flat,plane surface, with as little abutmentv or resistance effect aspossible, the whole forward sides of the flukes being refined down to a'relatively keen sharp cutting edge to enhan'c'ethe penetratingqualities; the shank also is given a relatively broad fiat section,havmg its greatest thickness longitudinally along its center line,andtapering vertically each way to a cutting edge, the object lbeing ltoreduce shank resistance to a minimum.

A further peculiarity of design is in the` construction of the pivot bywhich the liukes are attached to the shank, the shank beingI providedat. each side with a trunnion or transverse bearing pin, constructedintegral with the shank, and upon which the ukes are pivotallysupported, 'the object of -this arrangementv being to provide a suitablelength of bearing to insure and preserve a central alignment of theshank .with the flukes.

In order to fully realize the maximum holding value in this type ofanchor, itl is not alone suiicient to reduce the penetrating resistanceto a minimum, but provisions must be made to eliminate an inherentdefeet characteristic of the double pivoted fluke type of anchor, suchdefect being the liability of rolling over and breaking out underdragging conditions.

Some of the contributing auses for this peculiarity of action are.:

1st. Unel ual earthA resistance,.c ausing one iuke to u down faster thanthe other.

2nd. on-alignment of shank with iiukes,

giving greater leverage to one fluke over` that of the other.

3rd. Shank resistance at the center line` of anchor, producing a-fulcrum eect upon which the anchor finds support for its roll'- inaction.

o 'cure the anchor of theseA critical delfacts, the following provisionshave been made. Correct alignment of the shank is msured b the peculiararran ement of pivotal bearlng for shank and ukes.

The shank-resistance at the center line of anchor has been reduced to aminimum, eliminating the fulcrum effect upon which the anchor foundsupport for its rolling ac- Neutralizing the unequal earth resistanceAis achieved by using twoy widely separated trip members, placed nearthe outer sides of thefiukes, and serving as stabilizers'by introducingavbalancing resistance when either fluke tends to advance downward aheadof the other.

Anchors of the double pivoted fluke type have also proven deficient whenit was found imperative to lay at short scope of the cable. All vesselslying at anchor with even a moderate wind blowing, have a perpetualyawing motion from side to side. This` motion is transmitted through thecable to the anchor and produces a similar swaying from side to s1 e.

Owing to the fact that these anchors have two ukes hooked into thebottom, they cannot pivot readily upon the lukes as they sway from sideto side, and in consequence the swaying motion causes them to break outand drag.4

- This deficiency is almost wholl eliminated or neutralized in myimprove anchor, by the use of the .thin wide shank, which buries downdeep in the mud. When t-he anchor hooks in, this broad shank provides asuitable resistance to absorb the swaying action of the vessel withoutdisturbing the anchor, or causing it to break outand drag. V.Otherfeaturesl and advantages of my invention will hereinafter appear.

In the drawing:

' Figure 1 is a plan view of my improved anchor` partly broken away,with the ilukes.

prone.

Fig. 2' is a partial side view thereof showin Ya ilukeangled as inoperation.

ig. 3 is a section on theline 3-3 on Fig. -1, and i Fig.4 4 is a'section on the line 1r-4 of Fig. 2.

In said views let 1 indicate the shank, having at its free end a ringoreyelet 2 for engaement by a cable, and let 3, 4, respectively 1n icatetrunnions which extend from op osite sides of the shank, at its otherend. he flakes 5 and 6 are alike and each has in its with aligned boltholes to receive a bolt 11' that passes through a .spacer 12, whichcarries a terminal trip line ring 13.

The spacer 12 1s an angular member having the forward surfaces 14, whichco-act with the end 15 of shank 1, and serve as stops, to limit thedegree of angular move#- ment of the iukes, the spacer being rigidlyconnected `to the flukes by reason of bolt 9 passing therethrough. A

Lateral equalizing means for the anchor, to prevent rolling actionthereof and to cause its flukes to both enter the sand or mud bottom inoperation, are here shown as a pair of angle members each having a web16 and ange 17. The angle members are mounted by their webs upon thebolt 9, respectively near the ends thereof, to be thus Widely spacedapart, their webs butting against the opposite ends of the bearingportions of the fiukes about the bearing openings8, being secured by thebolt head 18 and nut 19. The flanges 17 lie transversely of the flukes,and are of sufficient length to serve their purpose, which, as stated,is that of stablizing the iukes, by preventing the anchor from turningunduly about its longitudinal axis, to cause greater engagement by onefluke than by the other.

The iuke bearing portions are recessed at 20 to accommodate the anglemembers, also the bolt head and nut, and the Webs 16 have each asaddle-like recess 21, to fit over the bearing portions 22, whereby theangle members become rigidly engaged with the flukes.

It will be noted that the shank 1 is relatively broad in aiplaneperpendicular to the axis of its trunnions, is transversely narsee Fig.4) while the flukes (see Fig. 3 are relatively narrow in a plane perpendicularvto the -same axis, and transversely broad. The shank taperstoward its opposite edges 23, and the flukes taper toward their oppositeedges 24. By these means strength of the shank and fiukes is provided,and they are each enabled to rea'dily cut into the sand or mud bottom,from either side.

It will also be noted that the flukes are headless, the lines of theirbearing portions merging into the blade lines with a tapering effect,without providing any transverse abutment such as would tend to retardthe entry of the flukes. into the sand or Inud bottom.

Variations within the spirit and scope of my invention are equallycomprehended by the foregoing disclosure.

I claim:

1. The combination, in an anchor, of a shank that is relatively broad inheight and narrow in width throughout its length, said shank beingtapered to cutting edges at both sides of its height, and iiukes pivotedto MILAN W. HALL.

